Wow each lamp was individually pinned out. How did they drive these? Big diode matrix?
Tom Harris <celephi...@gmail.com> On Thu, 6 May 2021 at 06:27, Tidak Ada <offl...@zeelandnet.nl> wrote: > There was ever a Mullard ZM1251. A 5×7 neon dot matrix at the size of a > stamp. > > > > eric > > > > *Van:* neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] > *Namens > *gregebert > *Verzonden:* woensdag 5 mei 2021 17:21 > *Aan:* neonixie-l > *Onderwerp:* [neonixie-l] Re: Neon Lamp Matrix > > > > If it was pulsed-DC, then it probably was simple multiplexing. > > > > I have thought about doing it with AC, which makes the driver more > complex, but it will make the bulbs last longer since both electrodes will > be illuminated (alternately, of course). Not sinusoidal AC, but > square-waves. If you do the math, a typical neon bulb is "on" for about 2/3 > of an AC cycle (on at 90V, off at 60V) so that would be my starting point > for multiplexing. I was thinking a 7 x 9 matrix, using 2:1 multiplexing. > It's more driving circuitry but it might be possible with an HV-series > device that can drive high and low. > > On Wednesday, May 5, 2021 at 5:46:13 AM UTC-7 celephicus wrote: > > Can someone please help me out, I remember an article from some scanned > book from the 60s where a set of neon lamps were connected in a matrix with > clever biasing and pulses on the row & column could toggle an individual > lamp. I thought it was the GE glow lamp manual but it seems not. > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to neonixie-l+unsubscr...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/3fbf8723-0461-443e-8b97-e4c97e1417can%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/3fbf8723-0461-443e-8b97-e4c97e1417can%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to neonixie-l+unsubscr...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/!%26!AAAAAAAAAAAYAAAAAAAAAPDddShx705MuX20yCpp0vvCgAAAEAAAAOBu0xzZizNPrRTLtoQw4iQBAAAAAA%3D%3D%40zeelandnet.nl > <https://groups.google.com/d/msgid/neonixie-l/!%26!AAAAAAAAAAAYAAAAAAAAAPDddShx705MuX20yCpp0vvCgAAAEAAAAOBu0xzZizNPrRTLtoQw4iQBAAAAAA%3D%3D%40zeelandnet.nl?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAHjG12RqPTfEge_aqXzBg7_L9hZjqAJFY2ebj_ZfqF9%2BFqcQNA%40mail.gmail.com.
